There was the Templeton prayer study done about a decade ago. This was a large study that cost US$2.4 million to run.
Long-Awaited Medical Study Questions the Power of Prayer http://www.nytimes.com/2006/03/31/health/31pray.html?pagewanted=all&_r=0 http://www.nytimes.com/2006/03/31/health/31pray.html?pagewanted=all&_r=0 Long-Awaited Medical Study Questions the Power of Pr... http://www.nytimes.com/2006/03/31/health/31pray.html?pagewanted=all&_r=0 Prayers by strangers had no effect on the recovery of people who were undergoing heart surgery, a large study has found. View on www.nytimes.com http://www.nytimes.com/2006/03/31/health/31pray.html?pagewanted=all&_r=0 Preview by Yahoo Because yagyas look like prayers, it seems doubtful that one could claim they are not. Notice that while the TMO does conduct research on certain things they studiously avoid researching yagyas, jyotish, and other woo technologies. There are no in-depth studies about the sidhis either. They looked for 'soma' and did not find anything.
